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tcg.c
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/*
* Tiny Code Generator for QEMU
*
* Copyright (c) 2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/* define it to use liveness analysis (better code) */
#define USE_LIVENESS_ANALYSIS
#include "config.h"
#if !defined(CONFIG_DEBUG_TCG) && !defined(NDEBUG)
/* define it to suppress various consistency checks (faster) */
#define NDEBUG
#endif
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#ifdef _WIN32
#include <malloc.h>
#endif
#ifdef _AIX
#include <alloca.h>
#endif
#include "qemu-common.h"
#include "cache-utils.h"
#include "host-utils.h"
#include "qemu-timer.h"
/* Note: the long term plan is to reduce the dependancies on the QEMU
CPU definitions. Currently they are used for qemu_ld/st
instructions */
#define NO_CPU_IO_DEFS
#include "cpu.h"
#include "exec-all.h"
#include "tcg-op.h"
#include "elf.h"
#if defined(CONFIG_USE_GUEST_BASE) && !defined(TCG_TARGET_HAS_GUEST_BASE)
#error GUEST_BASE not supported on this host.
#endif
static void tcg_target_init(TCGContext *s);
static void tcg_target_qemu_prologue(TCGContext *s);
static void patch_reloc(uint8_t *code_ptr, int type,
tcg_target_long value, tcg_target_long addend);
static TCGOpDef tcg_op_defs[] = {
#define DEF(s, oargs, iargs, cargs, flags) { #s, oargs, iargs, cargs, iargs + oargs + cargs, flags },
#include "tcg-opc.h"
#undef DEF
};
static TCGRegSet tcg_target_available_regs[2];
static TCGRegSet tcg_target_call_clobber_regs;
/* XXX: move that inside the context */
uint16_t *gen_opc_ptr;
TCGArg *gen_opparam_ptr;
static inline void tcg_out8(TCGContext *s, uint8_t v)
{
*s->code_ptr++ = v;
}
static inline void tcg_out16(TCGContext *s, uint16_t v)
{
*(uint16_t *)s->code_ptr = v;
s->code_ptr += 2;
}
static inline void tcg_out32(TCGContext *s, uint32_t v)
{
*(uint32_t *)s->code_ptr = v;
s->code_ptr += 4;
}
/* label relocation processing */
static void tcg_out_reloc(TCGContext *s, uint8_t *code_ptr, int type,
int label_index, long addend)
{
TCGLabel *l;
TCGRelocation *r;
l = &s->labels[label_index];
if (l->has_value) {
/* FIXME: This may break relocations on RISC targets that
modify instruction fields in place. The caller may not have
written the initial value. */
patch_reloc(code_ptr, type, l->u.value, addend);
} else {
/* add a new relocation entry */
r = tcg_malloc(sizeof(TCGRelocation));
r->type = type;
r->ptr = code_ptr;
r->addend = addend;
r->next = l->u.first_reloc;
l->u.first_reloc = r;
}
}
static void tcg_out_label(TCGContext *s, int label_index,
tcg_target_long value)
{
TCGLabel *l;
TCGRelocation *r;
l = &s->labels[label_index];
if (l->has_value)
tcg_abort();
r = l->u.first_reloc;
while (r != NULL) {
patch_reloc(r->ptr, r->type, value, r->addend);
r = r->next;
}
l->has_value = 1;
l->u.value = value;
}
int gen_new_label(void)
{
TCGContext *s = &tcg_ctx;
int idx;
TCGLabel *l;
if (s->nb_labels >= TCG_MAX_LABELS)
tcg_abort();
idx = s->nb_labels++;
l = &s->labels[idx];
l->has_value = 0;
l->u.first_reloc = NULL;
return idx;
}
#include "tcg-target.c"
/* pool based memory allocation */
void *tcg_malloc_internal(TCGContext *s, int size)
{
TCGPool *p;
int pool_size;
if (size > TCG_POOL_CHUNK_SIZE) {
/* big malloc: insert a new pool (XXX: could optimize) */
p = qemu_malloc(sizeof(TCGPool) + size);
p->size = size;
if (s->pool_current)
s->pool_current->next = p;
else
s->pool_first = p;
p->next = s->pool_current;
} else {
p = s->pool_current;
if (!p) {
p = s->pool_first;
if (!p)
goto new_pool;
} else {
if (!p->next) {
new_pool:
pool_size = TCG_POOL_CHUNK_SIZE;
p = qemu_malloc(sizeof(TCGPool) + pool_size);
p->size = pool_size;
p->next = NULL;
if (s->pool_current)
s->pool_current->next = p;
else
s->pool_first = p;
} else {
p = p->next;
}
}
}
s->pool_current = p;
s->pool_cur = p->data + size;
s->pool_end = p->data + p->size;
return p->data;
}
void tcg_pool_reset(TCGContext *s)
{
s->pool_cur = s->pool_end = NULL;
s->pool_current = NULL;
}
void tcg_context_init(TCGContext *s)
{
int op, total_args, n;
TCGOpDef *def;
TCGArgConstraint *args_ct;
int *sorted_args;
memset(s, 0, sizeof(*s));
s->temps = s->static_temps;
s->nb_globals = 0;
/* Count total number of arguments and allocate the corresponding
space */
total_args = 0;
for(op = 0; op < NB_OPS; op++) {
def = &tcg_op_defs[op];
n = def->nb_iargs + def->nb_oargs;
total_args += n;
}
args_ct = qemu_malloc(sizeof(TCGArgConstraint) * total_args);
sorted_args = qemu_malloc(sizeof(int) * total_args);
for(op = 0; op < NB_OPS; op++) {
def = &tcg_op_defs[op];
def->args_ct = args_ct;
def->sorted_args = sorted_args;
n = def->nb_iargs + def->nb_oargs;
sorted_args += n;
args_ct += n;
}
tcg_target_init(s);
}
void tcg_prologue_init(TCGContext *s)
{
/* init global prologue and epilogue */
s->code_buf = code_gen_prologue;
s->code_ptr = s->code_buf;
tcg_target_qemu_prologue(s);
flush_icache_range((unsigned long)s->code_buf,
(unsigned long)s->code_ptr);
}
void tcg_set_frame(TCGContext *s, int reg,
tcg_target_long start, tcg_target_long size)
{
s->frame_start = start;
s->frame_end = start + size;
s->frame_reg = reg;
}
void tcg_func_start(TCGContext *s)
{
int i;
tcg_pool_reset(s);
s->nb_temps = s->nb_globals;
for(i = 0; i < (TCG_TYPE_COUNT * 2); i++)
s->first_free_temp[i] = -1;
s->labels = tcg_malloc(sizeof(TCGLabel) * TCG_MAX_LABELS);
s->nb_labels = 0;
s->current_frame_offset = s->frame_start;
gen_opc_ptr = gen_opc_buf;
gen_opparam_ptr = gen_opparam_buf;
}
static inline void tcg_temp_alloc(TCGContext *s, int n)
{
if (n > TCG_MAX_TEMPS)
tcg_abort();
}
static inline int tcg_global_reg_new_internal(TCGType type, int reg,
const char *name)
{
TCGContext *s = &tcg_ctx;
TCGTemp *ts;
int idx;
#if TCG_TARGET_REG_BITS == 32
if (type != TCG_TYPE_I32)
tcg_abort();
#endif
if (tcg_regset_test_reg(s->reserved_regs, reg))
tcg_abort();
idx = s->nb_globals;
tcg_temp_alloc(s, s->nb_globals + 1);
ts = &s->temps[s->nb_globals];
ts->base_type = type;
ts->type = type;
ts->fixed_reg = 1;
ts->reg = reg;
ts->name = name;
s->nb_globals++;
tcg_regset_set_reg(s->reserved_regs, reg);
return idx;
}
TCGv_i32 tcg_global_reg_new_i32(int reg, const char *name)
{
int idx;
idx = tcg_global_reg_new_internal(TCG_TYPE_I32, reg, name);
return MAKE_TCGV_I32(idx);
}
TCGv_i64 tcg_global_reg_new_i64(int reg, const char *name)
{
int idx;
idx = tcg_global_reg_new_internal(TCG_TYPE_I64, reg, name);
return MAKE_TCGV_I64(idx);
}
static inline int tcg_global_mem_new_internal(TCGType type, int reg,
tcg_target_long offset,
const char *name)
{
TCGContext *s = &tcg_ctx;
TCGTemp *ts;
int idx;
idx = s->nb_globals;
#if TCG_TARGET_REG_BITS == 32
if (type == TCG_TYPE_I64) {
char buf[64];
tcg_temp_alloc(s, s->nb_globals + 2);
ts = &s->temps[s->nb_globals];
ts->base_type = type;
ts->type = TCG_TYPE_I32;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
#ifdef TCG_TARGET_WORDS_BIGENDIAN
ts->mem_offset = offset + 4;
#else
ts->mem_offset = offset;
#endif
pstrcpy(buf, sizeof(buf), name);
pstrcat(buf, sizeof(buf), "_0");
ts->name = strdup(buf);
ts++;
ts->base_type = type;
ts->type = TCG_TYPE_I32;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
#ifdef TCG_TARGET_WORDS_BIGENDIAN
ts->mem_offset = offset;
#else
ts->mem_offset = offset + 4;
#endif
pstrcpy(buf, sizeof(buf), name);
pstrcat(buf, sizeof(buf), "_1");
ts->name = strdup(buf);
s->nb_globals += 2;
} else
#endif
{
tcg_temp_alloc(s, s->nb_globals + 1);
ts = &s->temps[s->nb_globals];
ts->base_type = type;
ts->type = type;
ts->fixed_reg = 0;
ts->mem_allocated = 1;
ts->mem_reg = reg;
ts->mem_offset = offset;
ts->name = name;
s->nb_globals++;
}
return idx;
}
TCGv_i32 tcg_global_mem_new_i32(int reg, tcg_target_long offset,
const char *name)
{
int idx;
idx = tcg_global_mem_new_internal(TCG_TYPE_I32, reg, offset, name);
return MAKE_TCGV_I32(idx);
}
TCGv_i64 tcg_global_mem_new_i64(int reg, tcg_target_long offset,
const char *name)
{
int idx;
idx = tcg_global_mem_new_internal(TCG_TYPE_I64, reg, offset, name);
return MAKE_TCGV_I64(idx);
}
static inline int tcg_temp_new_internal(TCGType type, int temp_local)
{
TCGContext *s = &tcg_ctx;
TCGTemp *ts;
int idx, k;
k = type;
if (temp_local)
k += TCG_TYPE_COUNT;
idx = s->first_free_temp[k];
if (idx != -1) {
/* There is already an available temp with the
right type */
ts = &s->temps[idx];
s->first_free_temp[k] = ts->next_free_temp;
ts->temp_allocated = 1;
assert(ts->temp_local == temp_local);
} else {
idx = s->nb_temps;
#if TCG_TARGET_REG_BITS == 32
if (type == TCG_TYPE_I64) {
tcg_temp_alloc(s, s->nb_temps + 2);
ts = &s->temps[s->nb_temps];
ts->base_type = type;
ts->type = TCG_TYPE_I32;
ts->temp_allocated = 1;
ts->temp_local = temp_local;
ts->name = NULL;
ts++;
ts->base_type = TCG_TYPE_I32;
ts->type = TCG_TYPE_I32;
ts->temp_allocated = 1;
ts->temp_local = temp_local;
ts->name = NULL;
s->nb_temps += 2;
} else
#endif
{
tcg_temp_alloc(s, s->nb_temps + 1);
ts = &s->temps[s->nb_temps];
ts->base_type = type;
ts->type = type;
ts->temp_allocated = 1;
ts->temp_local = temp_local;
ts->name = NULL;
s->nb_temps++;
}
}
return idx;
}
TCGv_i32 tcg_temp_new_internal_i32(int temp_local)
{
int idx;
idx = tcg_temp_new_internal(TCG_TYPE_I32, temp_local);
return MAKE_TCGV_I32(idx);
}
TCGv_i64 tcg_temp_new_internal_i64(int temp_local)
{
int idx;
idx = tcg_temp_new_internal(TCG_TYPE_I64, temp_local);
return MAKE_TCGV_I64(idx);
}
static inline void tcg_temp_free_internal(int idx)
{
TCGContext *s = &tcg_ctx;
TCGTemp *ts;
int k;
assert(idx >= s->nb_globals && idx < s->nb_temps);
ts = &s->temps[idx];
assert(ts->temp_allocated != 0);
ts->temp_allocated = 0;
k = ts->base_type;
if (ts->temp_local)
k += TCG_TYPE_COUNT;
ts->next_free_temp = s->first_free_temp[k];
s->first_free_temp[k] = idx;
}
void tcg_temp_free_i32(TCGv_i32 arg)
{
tcg_temp_free_internal(GET_TCGV_I32(arg));
}
void tcg_temp_free_i64(TCGv_i64 arg)
{
tcg_temp_free_internal(GET_TCGV_I64(arg));
}
TCGv_i32 tcg_const_i32(int32_t val)
{
TCGv_i32 t0;
t0 = tcg_temp_new_i32();
tcg_gen_movi_i32(t0, val);
return t0;
}
TCGv_i64 tcg_const_i64(int64_t val)
{
TCGv_i64 t0;
t0 = tcg_temp_new_i64();
tcg_gen_movi_i64(t0, val);
return t0;
}
TCGv_i32 tcg_const_local_i32(int32_t val)
{
TCGv_i32 t0;
t0 = tcg_temp_local_new_i32();
tcg_gen_movi_i32(t0, val);
return t0;
}
TCGv_i64 tcg_const_local_i64(int64_t val)
{
TCGv_i64 t0;
t0 = tcg_temp_local_new_i64();
tcg_gen_movi_i64(t0, val);
return t0;
}
void tcg_register_helper(void *func, const char *name)
{
TCGContext *s = &tcg_ctx;
int n;
if ((s->nb_helpers + 1) > s->allocated_helpers) {
n = s->allocated_helpers;
if (n == 0) {
n = 4;
} else {
n *= 2;
}
s->helpers = realloc(s->helpers, n * sizeof(TCGHelperInfo));
s->allocated_helpers = n;
}
s->helpers[s->nb_helpers].func = (tcg_target_ulong)func;
s->helpers[s->nb_helpers].name = name;
s->nb_helpers++;
}
/* Note: we convert the 64 bit args to 32 bit and do some alignment
and endian swap. Maybe it would be better to do the alignment
and endian swap in tcg_reg_alloc_call(). */
void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags,
int sizemask, TCGArg ret, int nargs, TCGArg *args)
{
#ifdef TCG_TARGET_I386
int call_type;
#endif
int i;
int real_args;
int nb_rets;
TCGArg *nparam;
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
for (i = 0; i < nargs; ++i) {
int is_64bit = sizemask & (1 << (i+1)*2);
int is_signed = sizemask & (2 << (i+1)*2);
if (!is_64bit) {
TCGv_i64 temp = tcg_temp_new_i64();
TCGv_i64 orig = MAKE_TCGV_I64(args[i]);
if (is_signed) {
tcg_gen_ext32s_i64(temp, orig);
} else {
tcg_gen_ext32u_i64(temp, orig);
}
args[i] = GET_TCGV_I64(temp);
}
}
#endif /* TCG_TARGET_EXTEND_ARGS */
*gen_opc_ptr++ = INDEX_op_call;
nparam = gen_opparam_ptr++;
#ifdef TCG_TARGET_I386
call_type = (flags & TCG_CALL_TYPE_MASK);
#endif
if (ret != TCG_CALL_DUMMY_ARG) {
#if TCG_TARGET_REG_BITS < 64
if (sizemask & 1) {
#ifdef TCG_TARGET_WORDS_BIGENDIAN
*gen_opparam_ptr++ = ret + 1;
*gen_opparam_ptr++ = ret;
#else
*gen_opparam_ptr++ = ret;
*gen_opparam_ptr++ = ret + 1;
#endif
nb_rets = 2;
} else
#endif
{
*gen_opparam_ptr++ = ret;
nb_rets = 1;
}
} else {
nb_rets = 0;
}
real_args = 0;
for (i = 0; i < nargs; i++) {
#if TCG_TARGET_REG_BITS < 64
int is_64bit = sizemask & (1 << (i+1)*2);
if (is_64bit) {
#ifdef TCG_TARGET_I386
/* REGPARM case: if the third parameter is 64 bit, it is
allocated on the stack */
if (i == 2 && call_type == TCG_CALL_TYPE_REGPARM) {
call_type = TCG_CALL_TYPE_REGPARM_2;
flags = (flags & ~TCG_CALL_TYPE_MASK) | call_type;
}
#endif
#ifdef TCG_TARGET_CALL_ALIGN_ARGS
/* some targets want aligned 64 bit args */
if (real_args & 1) {
*gen_opparam_ptr++ = TCG_CALL_DUMMY_ARG;
real_args++;
}
#endif
/* If stack grows up, then we will be placing successive
arguments at lower addresses, which means we need to
reverse the order compared to how we would normally
treat either big or little-endian. For those arguments
that will wind up in registers, this still works for
HPPA (the only current STACK_GROWSUP target) since the
argument registers are *also* allocated in decreasing
order. If another such target is added, this logic may
have to get more complicated to differentiate between
stack arguments and register arguments. */
#if defined(TCG_TARGET_WORDS_BIGENDIAN) != defined(TCG_TARGET_STACK_GROWSUP)
*gen_opparam_ptr++ = args[i] + 1;
*gen_opparam_ptr++ = args[i];
#else
*gen_opparam_ptr++ = args[i];
*gen_opparam_ptr++ = args[i] + 1;
#endif
real_args += 2;
continue;
}
#endif /* TCG_TARGET_REG_BITS < 64 */
*gen_opparam_ptr++ = args[i];
real_args++;
}
*gen_opparam_ptr++ = GET_TCGV_PTR(func);
*gen_opparam_ptr++ = flags;
*nparam = (nb_rets << 16) | (real_args + 1);
/* total parameters, needed to go backward in the instruction stream */
*gen_opparam_ptr++ = 1 + nb_rets + real_args + 3;
#if defined(TCG_TARGET_EXTEND_ARGS) && TCG_TARGET_REG_BITS == 64
for (i = 0; i < nargs; ++i) {
int is_64bit = sizemask & (1 << (i+1)*2);
if (!is_64bit) {
TCGv_i64 temp = MAKE_TCGV_I64(args[i]);
tcg_temp_free_i64(temp);
}
}
#endif /* TCG_TARGET_EXTEND_ARGS */
}
#if TCG_TARGET_REG_BITS == 32
void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1,
int c, int right, int arith)
{
if (c == 0) {
tcg_gen_mov_i32(TCGV_LOW(ret), TCGV_LOW(arg1));
tcg_gen_mov_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1));
} else if (c >= 32) {
c -= 32;
if (right) {
if (arith) {
tcg_gen_sari_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
tcg_gen_sari_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), 31);
} else {
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_HIGH(arg1), c);
tcg_gen_movi_i32(TCGV_HIGH(ret), 0);
}
} else {
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_LOW(arg1), c);
tcg_gen_movi_i32(TCGV_LOW(ret), 0);
}
} else {
TCGv_i32 t0, t1;
t0 = tcg_temp_new_i32();
t1 = tcg_temp_new_i32();
if (right) {
tcg_gen_shli_i32(t0, TCGV_HIGH(arg1), 32 - c);
if (arith)
tcg_gen_sari_i32(t1, TCGV_HIGH(arg1), c);
else
tcg_gen_shri_i32(t1, TCGV_HIGH(arg1), c);
tcg_gen_shri_i32(TCGV_LOW(ret), TCGV_LOW(arg1), c);
tcg_gen_or_i32(TCGV_LOW(ret), TCGV_LOW(ret), t0);
tcg_gen_mov_i32(TCGV_HIGH(ret), t1);
} else {
tcg_gen_shri_i32(t0, TCGV_LOW(arg1), 32 - c);
/* Note: ret can be the same as arg1, so we use t1 */
tcg_gen_shli_i32(t1, TCGV_LOW(arg1), c);
tcg_gen_shli_i32(TCGV_HIGH(ret), TCGV_HIGH(arg1), c);
tcg_gen_or_i32(TCGV_HIGH(ret), TCGV_HIGH(ret), t0);
tcg_gen_mov_i32(TCGV_LOW(ret), t1);
}
tcg_temp_free_i32(t0);
tcg_temp_free_i32(t1);
}
}
#endif
static void tcg_reg_alloc_start(TCGContext *s)
{
int i;
TCGTemp *ts;
for(i = 0; i < s->nb_globals; i++) {
ts = &s->temps[i];
if (ts->fixed_reg) {
ts->val_type = TEMP_VAL_REG;
} else {
ts->val_type = TEMP_VAL_MEM;
}
}
for(i = s->nb_globals; i < s->nb_temps; i++) {
ts = &s->temps[i];
ts->val_type = TEMP_VAL_DEAD;
ts->mem_allocated = 0;
ts->fixed_reg = 0;
}
for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
s->reg_to_temp[i] = -1;
}
}
static char *tcg_get_arg_str_idx(TCGContext *s, char *buf, int buf_size,
int idx)
{
TCGTemp *ts;
ts = &s->temps[idx];
if (idx < s->nb_globals) {
pstrcpy(buf, buf_size, ts->name);
} else {
if (ts->temp_local)
snprintf(buf, buf_size, "loc%d", idx - s->nb_globals);
else
snprintf(buf, buf_size, "tmp%d", idx - s->nb_globals);
}
return buf;
}
char *tcg_get_arg_str_i32(TCGContext *s, char *buf, int buf_size, TCGv_i32 arg)
{
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I32(arg));
}
char *tcg_get_arg_str_i64(TCGContext *s, char *buf, int buf_size, TCGv_i64 arg)
{
return tcg_get_arg_str_idx(s, buf, buf_size, GET_TCGV_I64(arg));
}
static int helper_cmp(const void *p1, const void *p2)
{
const TCGHelperInfo *th1 = p1;
const TCGHelperInfo *th2 = p2;
if (th1->func < th2->func)
return -1;
else if (th1->func == th2->func)
return 0;
else
return 1;
}
/* find helper definition (Note: A hash table would be better) */
static TCGHelperInfo *tcg_find_helper(TCGContext *s, tcg_target_ulong val)
{
int m, m_min, m_max;
TCGHelperInfo *th;
tcg_target_ulong v;
if (unlikely(!s->helpers_sorted)) {
qsort(s->helpers, s->nb_helpers, sizeof(TCGHelperInfo),
helper_cmp);
s->helpers_sorted = 1;
}
/* binary search */
m_min = 0;
m_max = s->nb_helpers - 1;
while (m_min <= m_max) {
m = (m_min + m_max) >> 1;
th = &s->helpers[m];
v = th->func;
if (v == val)
return th;
else if (val < v) {
m_max = m - 1;
} else {
m_min = m + 1;
}
}
return NULL;
}
static const char * const cond_name[] =
{
[TCG_COND_EQ] = "eq",
[TCG_COND_NE] = "ne",
[TCG_COND_LT] = "lt",
[TCG_COND_GE] = "ge",
[TCG_COND_LE] = "le",
[TCG_COND_GT] = "gt",
[TCG_COND_LTU] = "ltu",
[TCG_COND_GEU] = "geu",
[TCG_COND_LEU] = "leu",
[TCG_COND_GTU] = "gtu"
};
void tcg_dump_ops(TCGContext *s, FILE *outfile)
{
const uint16_t *opc_ptr;
const TCGArg *args;
TCGArg arg;
TCGOpcode c;
int i, k, nb_oargs, nb_iargs, nb_cargs, first_insn;
const TCGOpDef *def;
char buf[128];
first_insn = 1;
opc_ptr = gen_opc_buf;
args = gen_opparam_buf;
while (opc_ptr < gen_opc_ptr) {
c = *opc_ptr++;
def = &tcg_op_defs[c];
if (c == INDEX_op_debug_insn_start) {
uint64_t pc;
#if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
pc = ((uint64_t)args[1] << 32) | args[0];
#else
pc = args[0];
#endif
if (!first_insn)
fprintf(outfile, "\n");
fprintf(outfile, " ---- 0x%" PRIx64, pc);
first_insn = 0;
nb_oargs = def->nb_oargs;
nb_iargs = def->nb_iargs;
nb_cargs = def->nb_cargs;
} else if (c == INDEX_op_call) {
TCGArg arg;
/* variable number of arguments */
arg = *args++;
nb_oargs = arg >> 16;
nb_iargs = arg & 0xffff;
nb_cargs = def->nb_cargs;
fprintf(outfile, " %s ", def->name);
/* function name */
fprintf(outfile, "%s",
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + nb_iargs - 1]));
/* flags */
fprintf(outfile, ",$0x%" TCG_PRIlx,
args[nb_oargs + nb_iargs]);
/* nb out args */
fprintf(outfile, ",$%d", nb_oargs);
for(i = 0; i < nb_oargs; i++) {
fprintf(outfile, ",");
fprintf(outfile, "%s",
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[i]));
}
for(i = 0; i < (nb_iargs - 1); i++) {
fprintf(outfile, ",");
if (args[nb_oargs + i] == TCG_CALL_DUMMY_ARG) {
fprintf(outfile, "<dummy>");
} else {
fprintf(outfile, "%s",
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[nb_oargs + i]));
}
}
} else if (c == INDEX_op_movi_i32
#if TCG_TARGET_REG_BITS == 64
|| c == INDEX_op_movi_i64
#endif
) {
tcg_target_ulong val;
TCGHelperInfo *th;
nb_oargs = def->nb_oargs;
nb_iargs = def->nb_iargs;
nb_cargs = def->nb_cargs;
fprintf(outfile, " %s %s,$", def->name,
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[0]));
val = args[1];
th = tcg_find_helper(s, val);
if (th) {
fprintf(outfile, "%s", th->name);
} else {
if (c == INDEX_op_movi_i32)
fprintf(outfile, "0x%x", (uint32_t)val);
else
fprintf(outfile, "0x%" PRIx64 , (uint64_t)val);
}
} else {
fprintf(outfile, " %s ", def->name);
if (c == INDEX_op_nopn) {
/* variable number of arguments */
nb_cargs = *args;
nb_oargs = 0;
nb_iargs = 0;
} else {
nb_oargs = def->nb_oargs;
nb_iargs = def->nb_iargs;
nb_cargs = def->nb_cargs;
}
k = 0;
for(i = 0; i < nb_oargs; i++) {
if (k != 0)
fprintf(outfile, ",");
fprintf(outfile, "%s",
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
}
for(i = 0; i < nb_iargs; i++) {
if (k != 0)
fprintf(outfile, ",");
fprintf(outfile, "%s",
tcg_get_arg_str_idx(s, buf, sizeof(buf), args[k++]));
}
switch (c) {
case INDEX_op_brcond_i32:
#if TCG_TARGET_REG_BITS == 32
case INDEX_op_brcond2_i32:
#elif TCG_TARGET_REG_BITS == 64
case INDEX_op_brcond_i64:
#endif
case INDEX_op_setcond_i32:
#if TCG_TARGET_REG_BITS == 32
case INDEX_op_setcond2_i32:
#elif TCG_TARGET_REG_BITS == 64
case INDEX_op_setcond_i64:
#endif
if (args[k] < ARRAY_SIZE(cond_name) && cond_name[args[k]])
fprintf(outfile, ",%s", cond_name[args[k++]]);
else
fprintf(outfile, ",$0x%" TCG_PRIlx, args[k++]);
i = 1;
break;
default:
i = 0;
break;
}
for(; i < nb_cargs; i++) {
if (k != 0)
fprintf(outfile, ",");
arg = args[k++];
fprintf(outfile, "$0x%" TCG_PRIlx, arg);
}
}
fprintf(outfile, "\n");
args += nb_iargs + nb_oargs + nb_cargs;
}
}
/* we give more priority to constraints with less registers */
static int get_constraint_priority(const TCGOpDef *def, int k)
{
const TCGArgConstraint *arg_ct;
int i, n;
arg_ct = &def->args_ct[k];
if (arg_ct->ct & TCG_CT_ALIAS) {
/* an alias is equivalent to a single register */
n = 1;
} else {
if (!(arg_ct->ct & TCG_CT_REG))
return 0;
n = 0;
for(i = 0; i < TCG_TARGET_NB_REGS; i++) {
if (tcg_regset_test_reg(arg_ct->u.regs, i))
n++;
}
}
return TCG_TARGET_NB_REGS - n + 1;
}
/* sort from highest priority to lowest */
static void sort_constraints(TCGOpDef *def, int start, int n)
{
int i, j, p1, p2, tmp;